遺い憾かんに堪たえない

expression, i-adjective

deeply regrettable; cannot help but regret

Formal expression used in official statements, apologies, or news reports to convey strong regret. Often appears as 遺憾に堪えません in polite contexts.

• 今こん回かいの不ふ祥しょう事じは遺い憾かんに堪たえません。